rails serverでつまずいた人へおくるエラー回避のしかた(64bit)

ruby 最新ver

rails 最新ver

#rails newでファイル作成

rails new ファイル名つくる

#rails serverをやってみる

エラーが出た!?

C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32/lib/nokogiri 
.rb:29:in `require': cannot load such file -- nokogiri/nokogiri (LoadError) 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32 
/lib/nokogiri.rb:29:in `rescue in <top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32 
/lib/nokogiri.rb:25:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/loofah-2.0.3/lib/loofah.rb:3 
:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/loofah-2.0.3/lib/loofah.rb:3 
:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rails-html-sanitizer-1.0.2/l 
ib/rails-html-sanitizer.rb:2:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rails-html-sanitizer-1.0.2/l 
ib/rails-html-sanitizer.rb:2:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/sanitize_helper.rb:3:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/sanitize_helper.rb:3:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/text_helper.rb:32:in `<module:TextHelper>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/text_helper.rb:29:in `<module:Helpers>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/text_helper.rb:6:in `<module:ActionView>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/text_helper.rb:4:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/form_tag_helper.rb:18:in `<module:FormTagHelper>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/form_tag_helper.rb:14:in `<module:Helpers>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/form_tag_helper.rb:8:in `<module:ActionView>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/form_tag_helper.rb:6:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/form_helper.rb:4:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers/form_helper.rb:4:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers.rb:50:in `<module:Helpers>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers.rb:4:in `<module:ActionView>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_ 
view/helpers.rb:3:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/legacy_asset_tag_helper.rb:7:in `<module:LegacyAssetTagHelper>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/legacy_asset_tag_helper.rb:6:in `<module:Rails>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/legacy_asset_tag_helper.rb:4:in `<module:Sprockets>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/legacy_asset_tag_helper.rb:3:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/helper.rb:45:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/helper.rb:45:in `<module:Helper>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/helper.rb:7:in `<module:Rails>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/helper.rb:6:in `<module:Sprockets>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/rails/helper.rb:5:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/railtie.rb:6:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sp 
rockets/railtie.rb:6:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/ra 
ils/railtie.rb:3:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/ra 
ils/railtie.rb:3:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/ra 
ils.rb:11:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/ra 
ils.rb:11:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass-ra 
ils.rb:1:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass-ra 
ils.rb:1:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/r 
untime.rb:76:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/r 
untime.rb:76:in `block (2 levels) in require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/r 
untime.rb:72:in `each' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/r 
untime.rb:72:in `block in require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/r 
untime.rb:61:in `each' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/r 
untime.rb:61:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler.r 
b:134:in `require' 
        from c:/books/config/application.rb:7:in `<top (required)>' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/com 
mands/commands_tasks.rb:78:in `require' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/com 
mands/commands_tasks.rb:78:in `block in server' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/com 
mands/commands_tasks.rb:75:in `tap' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/com 
mands/commands_tasks.rb:75:in `server' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/com 
mands/commands_tasks.rb:39:in `run_command!' 
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/com 
mands.rb:17:in `<top (required)>' 
        from bin/rails:4:in `require' 
        from bin/rails:4:in `<main>'

#エラーの回避のやりかた
##コマンドプロンプトで作成したファイル名にチェンジディレクトリします
```
例：cd c:￥ファイル名
```
##gemfileの編集

コマンドプロンプトでvim gemfileと入力

```
gem 'nokogiri', '~> 1.6', '>= 1.6.7.rc3'
```
を書き足す

##gemをインストール
```
gem install nokogiri -v 1.6.7.rc3 --pre
```

##bundleアップデート
```
bundle update nokogiri
```
##サーバーを建ててみる
```
rails server
```
##結果

建てた

##原因

nokogiriがエラーの原因だったかも・・・・